TETRAHEDRON LETTERS, vol. 45, no. 4, page. 723 - 727, 2004-01-19
JOURNAL OF ORGANIC CHEMISTRY, vol. 70, no. 18, page. 7227 - 7231, 2005-09-02
BULLETIN OF THE KOREAN CHEMICAL SOCIETY, vol. 25, no. 3, page. 420 - 422, 2004-03-20
TETRAHEDRON LETTERS, vol. 45, no. 37, page. 6835 - 6838, 2004-09-06